42641655021225 has 36 divisors (see below), whose sum is σ = 82251014579916. Its totient is φ = 20992814778240.

The previous prime is 42641655021209. The next prime is 42641655021289. The reversal of 42641655021225 is 52212055614624.

42641655021225 is a `hidden beast` number, since 4 + 2 + 6 + 4 + 16 + 5 + 502 + 122 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 783692349696 + 41857962671529 = 885264^2 + 6469773^2 .

It is not a de Polignac number, because 42641655021225 - 2⁴ = 42641655021209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7289168874 + ... + 7289174723.

Almost surely, 2^{42641655021225} is an apocalyptic number.

42641655021225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42641655021225 is a deficient number, since it is larger than the sum of its proper divisors (39609359558691).

42641655021225 is a wasteful number, since it uses less digits than its factorization.

42641655021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14578343626 (or 14578343618 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 42641655021225 in words is "forty-two trillion, six hundred forty-one billion, six hundred fifty-five million, twenty-one thousand, two hundred twenty-five".